from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An abnormal mass of tissue arising from the conjunctiva of the inner corner of the eye that obstructs vision by growing over the cornea.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An abnormal mass of tissue in the corner of the eye that obstructs vision
from the GNU version of the Collaborative International Dictionary of English
- n. A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.
from The Century Dictionary and Cyclopedia
- n. In zoology and anatomy, a limb or member of one of the vertebrates, as a fish, in the most general sense, without reference to its specialization in any given instance.
- n. In pathology, a more or less triangular patch of hypertrophied conjunctiva and subconjunctival tissue with its apex at the edge of the cornea or upon the cornea.
- n. In entomology, one of the two lateral expansions at the end of the rostrum of certain weevils. They lie above and partly conceal the scrobes or grooves in which the antennæ are concealed.
- n. An instrument employed in the operation for the removal of a pterygium from the cornea.
- n. A forward growth of the eponychium over the nail-plate.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula
New Latin, from Greek pterugion, diminutive of pterux, pterug-, wing; see pterygoid.(American Heritage® Dictionary of the English Language, Fourth Edition)